Misting outside plants

Let's see ..... you can't be talking about containerized plants, because they all need watering; so you must be talking about plants in the garden.

I don't mist any plants - indoors or outdoors. When I water, I purposely try not to wet the foliage. Depending on where you live, you may or may not need to water outdoor, in-ground plantings to keep them healthy, but if they are growing under drought stress, simply misting isn't going to alleviate the issue.

More plants tolerate misting poorly than tolerate misting well, the key word being 'tolerate' as opposed to 'appreciate', so as a general practice outdoors I avoid it, and indoors I avoid it entirely.

Many fungal diseases need a moist incubation period of a certain length of time for their populations to explode. Misting or misting at the wrong time can provide the moist incubation period, both indoors and outdoors that these fungi need. Water dripping from leaf to leaf or plant to plant can also spread the fungi. This is why air movement is so important in helping to prevent fungal infections - it keeps plant surfaces dry.

Misting would be a waste of water here. It dries so fast it just can't help any.
After a fire in the area I do hose down my garden to wash ash off but I always do it on a windy day so it dries off quickly.